glaucophane

Noun

 * 1)  A blue amphibole mineral, a mixed aluminate of sodium, magnesium and aluminium that exhibits pleochroism, with the chemical formula Na2(Mg,Fe2+)3Al2Si8O22(OH)2.

Translations

 * Finnish: glaukofaani
 * French:
 * German: Glaukophan
 * Italian: glaucofane
 * Spanish: glaucofana